automobile-2016_posters-accepted-abstracts

Volume 5, Issue 2(Suppl)

Adv Automob Eng 2016

ISSN: 2167-7670, AAE an open access journal

Page 64

Automobile 2016

December 01-02, 2016

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Automobile Engineering

December 01-02, 2016 Valencia, Spain

International Conference and Exhibition on

Adv Automob Eng 2016, 5:2(Suppl)

Design, analysis and fabrication of an automotive F-N-R gearbox with spur-gear differential

K G Sachin

Amrita Viswa Vidyapeetham, India

ower transmission is an inevitable part in any automobile. The power from the prime mover (engine/motor) is transferred to the

wheels using a suitable transmission system. Various designs of gearbox have been developed in the past. In this paper, an F-N-R

(forward-neutral-reverse) gearbox with a compact spur-gear differential is designed by following the design parameters for spur gear,

for the required output torque of a vehicle. All the gears and casing for the gearbox is modeled using Solidworks tool. A simple and

user-friendly shifting mechanism is designed for the gearbox, adding to comfort. A new spur-gear differential is designed, having

spur gears to accomplish differential action, which is more compact and light-weight compared to a conventional differential, since

the heavy bevel gear assembly is omitted. Different analyses such as static, dynamic (time-dependent), contact, modal and fatigue

analyses are done using ANSYS software. The main objective is to design and fabricate a light-weight, efficient and compact F-N-R

gearbox as a replacement to current models.

Motor torque control algorithm to prevent rollover for in-wheel drive electric vehicle

Kangneoung Lee, Hyunjong Ha, Sungbae Jeon

and

Hyunsoo Kim

Sungkyunkwan University, Korea

n this study, an in-wheel motor torque control strategy was proposed for a 4-wheel drive in-wheel type electric vehicle by

considering the rollover risk, vehicle driving and handling performance. LTR (lateral load transfer ratio), which is the rollover

index, is significantly relevant to the vehicle lateral acceleration. For reducing the rollover risk, the vehicle lateral acceleration must

be decreased. Lateral acceleration depends on the vehicle speed and turning radius. These factors can be controlled by the in-wheel

motor torque control. To develop the in-wheel motor torque control strategy, the LTR was calculated from the vehicle dynamics to

estimate the rollover. Threshold of LTR was introduced using the vehicle specifiations. LTR error which is the difference between the

threshold of LTR and actual LTR was used to control the front and rear motor torques. Motor control strategy was composed of two

parts: First, to reduce the vehicle velocity, output torque of the in-wheel motors at all wheels were reduced depending on the amount

of the LTR error. In addition, co-operative braking control was performed using the electro-hydraulic braking system. Second, to

improve the handling performance, additional output torque control of the front in-wheel motors were carried out. Through the

simulation results, it was found that the rollover risk was decreased as much as 30% by the in-wheel motor torque control compared

to that of no control.